Seiko Cal. 5637 - 339

Seiko 5637-339

The Seiko 5637-339 represents an important milestone in Seiko's 1975 lineup. Powered by the 5637 caliber with 36j jewels beating at 28,800 bph, it delivers a 43 hours power reserve. [seikata-wm-4a1b30c725b7]

Also known as: Sea Horse

Specifications

Movement
Automatic
Case Material
Titanium
Case Width
41mm
Case Thickness
12.4mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
40m
Dial Color
Burgundy
Jewels
36j
Frequency
28,800 bph
Power Reserve
43 hours
Year
1975

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